The Quran does not explicitly mention anal intercourse at all, rather what it condemns is more general:
ولوطا إذ قال لقومه أتأتون الفاحشة ما سبقكم بها من أحد من العالمين إنكم لتأتون الرجال شهوة من دون النساء بل أنتم قوم مسرفون
And [We had sent] Lot when he said to his people, "Do you commit such immorality as no one has preceded you with from among ...
No you can't , you have to arrange Halal food for yourself . When you were going obviously you were aware about it .
In some cases when you are near to die , you can eat "Haram" for the sake of survival.